TCM8000FN [TI]
Cellular Telephone Audio Processor 44-PLCC;
| 型号： | TCM8000FN |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Cellular Telephone Audio Processor 44-PLCC 电信 信息通信管理 电信集成电路 |
| 文件： | 总19页 (文件大小：226K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
FN PACKAGE
(TOP VIEW)
•
Switchable AMPS/TACS and NMT
Operation
•
•
•
•
•
•
•
•
•
Integrated RX and TX Voice Filters
Integrated RX and TX Data Filters
Narrow-Band RX SAT Filter
6
5
4
3
2
1 44 43 42 41 40
39
LIMIN
POUT
TXLIM
TXVI
CMPR
CO
CVE
CTC
CIN
TXVO
TDI
DAC
RXLIM
RXDO
HSO
HFO
ST
7
8
38
37
36
35
34
33
32
31
30
29
Pre-Emphasis and De-Emphasis Filtering
CCITT-Compatible Compandor
Adjustable TX and RX Limiters
Loudspeaker Driver
9
10
11
12
13
14
15
16
17
CTI
RXVI
EXO
EXIN
ETC
Microphone Preamplifiers
Digitally Controlled Gains and Signal
Muting
18 19 20 21 22 23 24 25 26 27 28
•
•
•
•
•
•
Low Power
Standby Mode
Simple 3-Wire Digital Interface
Low External Component Count
Single 5-V Supply
FR PACKAGE
(TOP VIEW)
44-Pin PLCC Package and Thin Quad Flat
Pack
44 43 42 41 40 39 38 37 36 35 34
M20
M2N
M2P
M1N
M1P
M1O
TXDA
XT0
TXO
TXSUM
PSO
1
33
2
32
31
30
29
28
27
26
25
24
23
description
3
LOAD
4
Implemented
in
advanced
LinBiCMOS
V
5
technology, the TCM8000 audio processor
provides a highly integrated solution for voice-
band signal processing in FM cellular mobile
and hand-portable telephones. The device
incorporates the necessary voice and data filters
as well as ancillary functions, such as microphone
preamplifiers, a loudspeaker driver, and a CCITT-
compatible compandor circuit. A simple 3-wire
serial interface provides digital control over signal
path switching, muting, and gain adjustment. The
filter responses can be switched to suit Advanced
BTX
V
6
CC
V
7
BRX
REF
RXO
DATA
DCLK
8
XT1
GND
RXIN
9
10
11
12 13 14 15 16 17 18 19 20 21 22
Mobile Phone System/Total Access Communication System (AMPS/TACS) and Nordic Mobile Telephone
(NMT) system requirements. Switched-capacitor techniques are used to implement the filtering functions, and
appropriate antialiasing and smoothing filters are incorporated in the device.
In the active mode, the TCM8000 uses less than 14 mA of supply current and can be set into a standby
configuration, which reduces the supply current to less than 4 mA.
The TCM8000 is characterized for operation from –25°C to 80°C.
Caution.These devices have limited built-in protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
LinBiCMOS is a trademark of Texas Instruments Incorporated.
Copyright 1993, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
CTI
13
RXLIM ST
12
RXO EXIN ETC
16 17
EXO RXVI
4
15
14
8
1
3
4
1
4
10
HSO
RXBP
Filter
18
Expander
Volume
Control
±15 dB
RXTRIM
±4 dB
RXIN
Σ
–6 dB
EBP
11
9
1
LSSW
RXSW
HFO
V
CC
Receive
Data
Filter
RXDO
3
4
7
REF
3
DAC
DAC
PSO
SAT
Filter
42
SATTRIM
–0 dB/7dB
19
GND
2
V
BRX
21
20
XT0
XT1
44
OSC
V
BTX
Transmit
Data
Filter
22
TXDA
23
1
M1O
A1
A2
4
1
24
25
M1P
M1N
+
–
MICTRIM
±4 dB
26
27
M2P
M2N
+
–
MICSW
TDSW
28
3
4
M2O
1
40
5
6
TXLP1
Filter
6 dB
TXLP2
Filter
6 dB
TXTRIM
±4 dB
DATA
DCLK
LOAD
Σ
TXO
Limiter
36
Digital
Control
CBP
TXSW
43
Compressor
30
TXVO
31
CIN CVE
39
LIMIN
38
POUT
29
TDI
36
TXVI
41
37
TXLIM
33
32
35
34
CO
TXSUM
CTC CMPR
Pin numbers shown are for the FN package.
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
Terminal Functions
PIN
NO.
I/O
DESCRIPTION
NAME
CIN
FN
FR
36
40
39
27
31
35
34
32
I
Compressor analog input
CMPR
CO
I
Compressor rectifier analog input
O
O
Compressor analog output. CO should be ac coupled to TXVI and to CMPR.
CTC
Compressortime constant control, analog output. A 220-nF capacitor should be connected between CTC and
GND.
CTI
13
18
I
Call tone analog input. Signals on CTI are summed into the receive voice path prior to the volume control
circuit. CTI can be muted under control of the serial interface.
CVE
33
7
38
12
10
11
22
I
O
I
Compressor virtual earth, analog input
DAC
DATA
DCLK
ETC
Digital-to-analog converter output, programmable between GND and V
Serial interface digital data input
/2 in sixteen steps
CC
5
6
I
Serial interface digital clock input
17
O
Expander time constant control, analog output. A 220-nF capacitor should be connected between ETC and
GND.
EXIN
EXO
16
15
19
11
10
39
43
21
20
24
16
15
44
4
I
Expander analog input
O
Expander analog output. EXO should be ac coupled to RXVI.
Ground
GND
HFO
O
O
I
Normal drive receiver voice analog output
High drive receiver voice analog output
Transmit limiter analog input
HSO
LIMIN
LOAD
I
Serial interface load, digital input. Data shifted into DATA under control of DCLK is transferred to internal
registers when LOAD goes high.
M1N
25
23
24
27
28
26
38
42
3
30
28
29
32
33
31
43
3
I
O
I
Preamplifier 1 negative analog input
Preamplifier 1 analog output
M1O
M1P
Preamplifier 1 positive analog input
Preamplifier 2 negative analog input
Preamplifier 2 analog output
M2N
I
M2O
M2P
O
I
Preamplifier 2 positive analog input
Preemphasis filter analog output. POUT should be ac coupled to LIMIN.
Analog output of SAT filter
POUT
PSO
O
O
REF
8
Unbuffered midsupply voltage, nominal output V
Receive data filter analog output
Receive analog input
/2
CC
RXDO
RXIN
RXLIM
9
14
23
13
O
I
18
8
I/O Receive limiter adjust voltage, controls maximum signal output on HSO. The dc input is between GND and
/2.
V
CC
RXO
RXVI
ST
4
14
12
29
9
19
17
34
O
I
Receive voice filter analog output
Receive voice analog input to volume control circuit. RXVI can be muted under control of the serial interface.
Side tone analog input. Signals on this terminal are summed into the HSO output signal.
I
TDI
I
Tone of DTMF analog input. Signals on this terminal can be used in place of the main voice signal in the TX
path and summed into the RX voice path, under control of the serial interface.
TXDA
TXLIM
TXO
22
37
40
41
27
42
1
I
I
Transmit data analog input
Transmit-limiterlevel adjust, controls maximum signal level at TXO. The dc input is between GND and V
Transmit section analog output
/2.
CC
O
I
TXSUM
2
Transmitsumminganaloginput. ThesignalonTXSUMissummedintothemainTXoutputafterallfilterstages.
TXSUM can be muted under control of the serial interface.
TXVI
36
30
41
35
I
Transmit voice analog input
TXVO
O
Transmit voice analog output. TXVO is the output from the preamplifier and microphone gain adjust sections.
It should be ac coupled into the compressor input CIN.
V
BRX
2
7
Buffered midsupply voltage to receive sections, nominal output V
/2
CC
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
Terminal Functions (continued)
PIN
NO.
I/O
DESCRIPTION
NAME
FN
FR
5
V
BTX
44
1
Buffered midsupply for all transmit sections, nominal output V
/2
CC
V
CC
6
Most positive supply voltage, 5 V ±5%
XT0,XT1 21,20 26,25
Crystal oscillator terminals for connection to 3.58-MHz crystal resonator
detailed description – transmit path
input conditioning
A pair of uncommitted operational amplifiers is provided at the main audio signal input. These components can
be configured using external resistors to adjust the gain as required to suit particular microphones and external
preamplifiers. The TCM8000 has been designed to provide 100 mVrms at the outputs of the preamplifier at pins
M1O and M2O. The switch MICSW allows the selection of either amplifier input for hands-free or handset
microphones. A digitally controlled gain/attenuation block, MICTRIM, allows adjustment of the signal level into
thecompressorinsixteen0.5-dBsteps. Adigitallycontrolledswitch, TDSW, allowsalternativesignalsfromother
sources such as audio or DTMF tones to be injected into the transmit signal path from TDI. The output of TDSW
is ac coupled at TXVO through an external capacitor into the compressor.
compressor
The compressor provides a 2:1 dynamic range compression of its input signal, converting an input range of
60 dB to 30 dB at its output. The test circuit diagram (Figure 2) shows the external components required to set
time constants and to limit gain under idle channel conditions. The envelope time constant is determined by
the value of a capacitor attached to CTC with 220 nF providing attack time of 3 ms approximately and decay
times of approximately 13 ms. The compressor can be bypassed under control of the serial interface. The output
from this stage, CO, is externally ac coupled into the transmit filter at TXVI and into the compressor rectifier input
at CMPR.
TX filtering and limiter
The transmit band limiter is located between a pair of band-pass filters. Filter TXF1 is located before the limiter
and provides 6 dB per octave preemphasis; filter TXF2, located after the limiter, features a phase-equalized
response to control overshoot. The frequency responses of TXF1 and TXF2 are switchable between 3 kHz and
3.4 kHz cut off to meet the requirements of AMPS/TACS and NMT systems, respectively. Frequency response
templates and typical responses are shown in Figures 3 through 6.
The limiter is provided to meet maximum deviation specifications, and the limit level is controlled by the dc
voltage applied to TXLIM. The output signal from POUT is ac coupled into the limiter input to eliminate
asymmetrical limiting that could arise as a result of dc offsets.
output conditioning
The voice output signal from TXLP2 is passed to a three-input summing circuit, whose other inputs come from
the TX data path and from TXSUM. Each input to the summing circuit can be enabled or muted under control
of the serial bus. The overall deviation level is controlled by a digitally controlled gain/attenuation block that
provides sixteen 0.5-dB steps of output level adjustment. The transmit supervisory audio tone (SAT) is applied
to TXSUM. TXSUM can also be used as an input for transmit data, allowing implementation of alternative data
filtering and conditioning to that implemented on the TCM8000.
transmit data
Transmit data, which is voice-band FSK coded for NMT and wide-band Manchester coded for AMPS and TACS
(8K-baud TACS, 10K-baud AMPS), is applied to TXDA. The signal is filtered by the TX DATA filter, whose
response can be switched from a band-pass to a low-pass configuration to meet the requirements of NMT and
AMPS/TACS, respectively. Frequency templates and typical responses are shown in Figures 7 and 8.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
detailed description – receive path
input conditioning
The received demodulated signal is applied to RXIN and passes to a gain-adjust block that provides ±4 dB of
adjustment in sixteen 0.5-dB steps. At this point, the receive signal path is split into the voice path, the data path,
and the supervisory audio-tone (SAT) path.
receive voice filter
The received voice signal is processed in the band-pass RXBP filter, whose response has been designed to
meet the requirements of AMPS/TACS and NMT systems. The response incorporates the required 6-dB/octave
de-emphasis. Frequency response templates and a typical response are shown in Figures 9 and 10.
expander
The expander implements a 2:1 dynamic range expansion of the signal at its input, EXIN. It is designed to
produce 0-dB gain at 100 mVrms. Envelope attack and decay times are determined by a capacitor attached
to ETC, with a value of 220 nF producing attack time of 3 ms and decay times of approximately 13 ms. The
expander can be bypassed under control of the serial interface.
receive summing circuit and volume control
A 3-input summing circuit is provided, which takes as input the voice signal from the expander, audio tones from
the TDI input, and a call-tone input applied to CTI. Each input can be enabled or muted under control of the serial
interface. The output from this block is passed to the volume control, which provides ±15 dB of output level
control in sixteen 2-dB steps.
output buffers
Two output buffer circuits are provided. The buffer that drives HFO is capable of driving loads down to 10-kΩ
impedance and is intended for use with an external speaker driver. The HSO buffer features a high-drive bipolar
output stage that allows impedances of 500 Ω to be driven directly with low distortion. The HSO output path also
incorporates a summing circuit to facilitate side-tone injection from the ST input and a limiter circuit, which allows
maximum sound pressure levels to be determined. The limit level is controlled by the voltage applied to RXLIM.
Selection between the HFO and HSO outputs is achieved via the serial interface.
receive data path
A switchable response filter is provided to condition receive data before it is output on RXDO. Frequency
response templates and typical responses are shown in Figures 11 and 12 for AMPS/TACS and NMT,
respectively.
receive SAT path
Received supervisory audio tones (SAT) are separated from the voice signal in a switchable response
narrow-band filter. This filter has a center frequency of 6 kHz in the AMPS/TACS mode and 4 kHz in the NMT
mode. The filter output is passed to a level-adjust circuit, which provides eight 1-dB steps of adjustment. The
processed SAT signal is output on PSO.
miscellaneous
midsupply
The analog midsupply, effectively signal ground, is derived from a resistive divider connected between V and
CC
GND to produce V /2 at REF. This voltage is buffered by a pair of low output impedance amplifiers to produce
CC
midrailsuppliesforthereceiveandtransmitsectionsatB
andV
,respectively,withseparatemidrailsused
BRX
BTX
to minimize coupling between the receive and transmit circuits. REF, V
ground with capacitors physically mounted as close to the device as possible. V
, and V
should be decoupled to
BTX
BRX
and V
directly control
BRX
BTX
the 0-dB point of the compressor and expander, respectively, so it is important that a stable and well-regulated
supply is provided to V
.
CC
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
detailed description – miscellaneous
crystal oscillator
A low-power crystal oscillator is provided to generate the master clock signal for the switched-capacitor filters.
Sampling frequencies and internal divide ratios have been selected to allow a low cost 3.58-MHz crystal to be
used. No external components except the crystal are required.
DAC
A four-bit digital-to-analog (DAC) converter provides sixteen levels from GND to V
in linear steps. The DAC
BRX
can be used to set limit levels by controlling TXLIM or RXLIM. Its output is unbuffered and should only be used
to drive high-impedance loads.
standby mode
The standby mode disables all signal paths with the exception of the receive data path. In the standby mode,
current consumption is reduced to less than 4 mA.
digital interface
The TCM8000 is configured using a three-wire digital interface. Eight-bit words, comprised of four address and
four data bits, are applied in serial to DATA and clocked into the device on the rising edge of DCLK. The data
is transferred to internal registers by pulsing the LOAD signal high (see Figure 1). All internal registers are reset
low on power up.
DCLK
DATA
LOAD
AD3
AD2
AD1
AD0
D3
D2
D1
D0
Figure 1. Serial Interface Timing Diagram
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
Table 1. Register Definitions
AD
AD
AD
AD
D
D
D
D
0
FUNCTION
3
2
1
0
3
2
1
0
0
0
0
VC
VC
VC
VC
Volume control
VC –VC set the output level on HFO and HSO in 2-dB steps from –16 dB
<0000> to 14 dB <1111> relative to nominal, <1000>
3
2
1
0
3
0
0
0
0
0
0
1
1
0
TX
TX
TX
TX
TXTRIM gain adjust
3
2
1
0
TX –TX set the main transmit output level in 0.5-dB steps from –4 dB
3
0
<0000> to 3.5 dB <1111> relative to nominal, <1000>
SBY
RTM RVM CTM SBY: Standby/active control, when set to 1, all sections of the device are
active; when set to 0, all sections apart from from the receive data path are
disabled.
RTM: Receive DTMF/tone mute, 1 = mute, 0 = enabled
RVM: Receive voice mute, 1 = mute, 0 = active
CTM: Call tone mute, 1 = mute, 0 = active
0
0
0
1
1
0
1
0
HSS
TSM TVM TDM HSS: Handset select, 1 selects HSO RX output and M1 preamplifier,
0 selects HFO output and M2 preamplifier
TSM: TXSUM mute, 1 = mute, 0 = active
TVM: Transmit voice mute, 1 = mute, 0 = active
TDM: Transmit data-path mute, 1 = mute, 0 = active
–
NAT
TTS
CEN NAT: NMT–AMPS/TACS select, 1 = NMT, 0 = AMPS/TACS
TTS: Transmit DTMF/tone select, 1 = DTMF/tone, 0 = TX voice
CEN: Compandor enable, 1 = compressor/expander enabled,
0 = bypassed (0-dB gain)
0
0
1
1
0
1
1
0
RX
RX
RX
RX
RXTRIM gain adjust
RX –RX set the main transmit output level in 0.5-dB steps from –4 dB
<0000> to 3.5 dB <1111> relative to nominal, <1000>
3
2
1
0
3
0
STM
ST
ST
ST
SATTRIM gain adjust
2
1
0
ST –ST set the receive SAT gain in 1-dB steps from –4 dB <000> to 3 dB
3
0
<111> relative to nominal, <100>,
STM: Receive SAT path mute, 1 = mute, 0 = active
0
1
1
1
1
MT
DA
MT
DA
MT
DA
MT
DA
MICTRIM gain adjust
3
2
1
0
MT –MT set the microphone trim gain in 0.5-dB steps from –4 dB <0000>
3
0
to 3.5 dB <1111> relative to nominal, <1000>
X
X
X
DAC control
3
2
1
0
DA –DA set the level on the DAC output from 0 <0000> to V <1111>
BRX
3
0
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 7 V
CC
Input voltage range, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND –0.3 V to V
+ 0.3 V
I
CC
Ground voltage range, GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 7 V
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25°C to 80°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 100°C
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: Voltage value is with respect to GND.
recommended operating conditions
MIN
4.75
3.5
TYP
MAX
UNIT
V
V
V
V
Supply voltage
5
5.25
CC
IH
IL
High-level input voltage
Low-level input voltage
Operating free-air temperature
V
0.8
80
V
T
A
– 25
°C
electrical characteristics over recommended operating temperature range, V
= 5 V,
CC
f
= 3.58 MHz
xtal
PARAMETER
TEST CONDITIONS
MIN
MAX
4
UNIT
Standby
I
Supply current
mA
CC
Operating
14
I
I
f
High-level input current
Low-level input current
V = 5 V
10
µA
µA
IH
I
V = 0 V
I
10
IL
Serial clock frequency, DCLK
200
kHz
clock
f = 1 kHz
f = 1 kHz
70
20
Input impedance, RXIN, RXVI, CTI, ST, TXVI, LIMIN, TXSUM, CIN, TXDA,
EXIN, CMPR, TDI
Z
i
kΩ
Midsupply reference voltage, REF
2.4
2.4
2.6
2.6
1
V
V
Buffered midsupply reference voltage, V
, V
BTX BRX
Input current at M1P, M1N, M2P, M2N, RXLIM, TXLIM
µA
transmit path specifications, V
= 5 V, f
= 3.58 MHz
xtal
CC
M1/M2 to TXVO, MICTRIM, A1 and A2 configured as unity gain inverting amplifiers, input = 100 mVrms at
1 kHz at M1 or M2 (see Table 1)
PARAMETER
MIN
MAX
±1
UNIT
dB
Gain, MICTRIM = <1000>
Step size
0.4
3
0.6
4
dB
Positive range
dB
Negative range
–4.5
–3.5
dB
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
transmit path specifications, V
= 5 V, f
= 3.58 MHz (continued)
xtal
CC
M1/M2 to TXO frequency response, NMT mode, TXLIM = 2.5 V, input = 20 mVrms, TXTRIM = <1000>,
MICTRIM = <1000>, compressor bypassed (see Figures 3 and 4 and Table 1)
PARAMETER
TEST CONDITIONS
MIN
MAX
13.5
–19
–9.5
–5
UNIT
Gain
f = 1 kHz
11.5
dB
f = 100 Hz
f = 300 Hz
f = 500 Hz
f = 2 kHz
–13.1
–7
5
7
Relative gain
f = 3 kHz
7.7
6.6
10.5
11.6
–40
–40
–16.5
dB
f = 3.4 kHz
f = 3.94 kHz
f = 4.06 kHz
f = 10 kHz
M1/M2 to TXO frequency response, AMPS/TACS mode, TXLIM = 2.5 V, input = 20 mVrms, TXTRIM = <1000>,
MICTRIM = <1000>, compressor bypassed (see Figures 5 and 6 and Table 1)
PARAMETER
TEST CONDITIONS
MIN
MAX
13.5
–19
–9.5
–5
UNIT
Gain
f = 1 kHz
11.5
dB
f = 100 Hz
f = 300 Hz
f = 500 Hz
f = 2 kHz
–13.1
–7
5
7
f = 2.75 kHz
f = 3 kHz
6.8
5.5
9.8
Relative gain
dB
10.5
10.8
–25
–25
–19
f = 3.1 kHz
f = 5.9 kHz
f = 6.1 kHz
f = 10 kHz
TXSUM to TXO gain adjust, input = 100 mVrms at 1 kHz (see Table 1)
PARAMETER
MIN
MAX
±1
UNIT
dB
Gain, TXTRIM = <1000>
Step size
0.4
3
0.6
4
dB
Positive range
dB
Negative range
–4.5
–3.5
dB
compressor gain characteristics, M1/M2 to TXO, f = 1 kHz, MICTRIM = <1000> (see Figure 2 for external
components)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Gain (reference)
Relative gain
M1/M2 = 100 mVrms
11
13
dB
M1/M2 = 100 mV+ 3 dB
M1/M2 = 100 mV – 25 dB
M1/M2 = 100 mV – 50 dB
1
2
–13
–12
dB
–25.5 –24.5
TX limiter, peak-to-peak output at TXO relative to nominal output, M1/M2 = 1 Vrms at 1 kHz,
MICTRIM = <1000>, compressor enabled, nominal output measured at TXO for 100 mVrms input at M1/M2
PARAMETER
TEST CONDITIONS
TXLIM = 500 mV
TXLIM = 550 mV
TXLIM = 600 mV
TXLIM = 650 mV
TXLIM = 800 mV
MIN
MAX
1.25
1.35
1.45
1.55
1.85
UNIT
Peak-to-peak output
V/V
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
transmit path specifications, V
= 5 V, f
= 3.58 MHz (continued)
xtal
CC
total harmonic distortion at TXO vs TXLIM, M1/M2 = 100 mVrms at 1 kHz, MICTRIM = <1000>,
TXTRIM = <1000>, compressor enabled
PARAMETER
TEST CONDITIONS
TXLIM = 500 mV
TXLIM = 550 mV
TXLIM = 600 mV
TXLIM = 800 mV
MIN
MAX
10%
4%
UNIT
Total harmonic distortion
1%
1%
noise at TXO, M1/M2 = V
, MICTRIM = <1000>, TXTRIM = <1000>, compressor enabled (see Table 1)
BTX
PARAMETER
MIN
MAX
UNIT
Psophometrically-weighted rms noise
4
mV
transmit path switch attenuation (see Table 1)
PARAMETER
TEST CONDITIONS
MICSW, HSS = 0/1
TDSW, TTS = 0/1
TXVOICE, TVM = 1
TXSUM, TSM = 1
TXDATA, TDM = 1
MIN
50
MAX
UNIT
50
50
dB
Attenuation
50
50
TDI to TXO gain, TDI = 100 mVrms at 1 kHz, TXTRIM = <1000> (see Table 1)
PARAMETER
MIN
MAX
UNIT
Gain
11
13
dB
transmit data frequency response, NMT mode, TXDA = 275 mVrms, TXTRIM = <1000>(see Figure 7 and
Table 1)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Gain
f = 1.5 kHz
2
4
dB
f = 100 Hz
–22
–5.6
2.9
f = 700 Hz
–7.6
1.9
f = 2.1 kHz
Relative gain
dB
f = 2.3 kHz
4.7
f = 3.5 kHz
4.7
f = 100 kHz
–25
transmit data frequency response, AMPS/TACS mode, TXDA = 400 mVrms, TXTRIM = <1000>(see Figure 8
and Table 1)
PARAMETER
TEST CONDITIONS
MIN
MAX
±1
UNIT
Gain
dB
f = 1 kHz
f = 8 kHz
±1
f = 16 kHz
f = 30 kHz
f = 100 kHz
–6
1
Relative gain
dB
–18
–18
digital-to-analog converter, measured at DAC (see Table 1 for codes)
PARAMETER
MIN
MAX
50
UNIT
mV
Output code <0000>
Output code <1111>, relative V
BRX
DNL, typical step size = 160 mV
–100
0
mV
0.5
LSB
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
receive path specifications, V
= 5 V, f
= 3.58 MHz
xtal
CC
RXIN to RXO, RXTRIM, RXIN = 100 mVrms at 1 kHz (see Table 1)
PARAMETER
MIN
–7
MAX
–5
UNIT
dB
Gain, RXTRIM = <1000>
Step size
0.4
3
0.6
4
dB
Positive range
dB
Negative range
–4.5
–3.5
dB
RXIN to HFO/HSO frequency response, RXIN = 60 mVrms, RXTRIM = <1000>, VC = <1000>, expander
bypassed (see Figures 9 and 10 and Table 1)
PARAMETER
TEST CONDITIONS
f = 1 kHz
MIN
MAX
–5
UNIT
Gain
–7
dB
f = 100 Hz
f = 240 Hz
f = 300 Hz
f = 500 Hz
f = 2 kHz
–30
13.4
11.5
7
7.9
5
Relative gain
–7
–5
dB
f = 3 kHz
–12
–17
–8.5
–9.6
–40
–40
f = 3.4 kHz
f = 4 kHz
f = 10 kHz
CTI to HFO/HSO, volume control, CTI = 100 mVrms at 1 kHz (see Table 1)
PARAMETER
MIN
0
MAX
2
UNIT
dB
Gain, VC = <1000>
Step size
1.8
13.5
2.2
14.5
dB
Positive range
Negative range
dB
–16.5 –15.5
dB
ST/TDI to HFO/HSO gain, ST/TDI = 100 mVrms at 1 kHz, VC = <1000> (see Table 1)
PARAMETER
MIN
MAX
–5
UNIT
dB
Gain ST to HSO
–7
Gain to TDI to HSO/HFO
±1
dB
expander gain characteristics, RXIN to HSO/HFO, f = 1 kHz, RXTRIM = <1000>, VC = <1000> (see Figure 2)
PARAMETER
TEST CONDITIONS
RXIN = 200 mVrms
MIN
MAX
±1
4
UNIT
Gain (reference)
dB
RXIN = 200 mV + 3 dB
RXIN = 200 mV – 12.5 dB
RXIN = 200 mV – 25 dB
2
Expanded relative gain
–13.5 –11.5
–23 –21
dB
RXlimiter, peak-to-peakoutputatHSOvsRXLIM, RXIN=500mVrmsat1kHz, RXTRIM=<1000>, VC=<1000>,
expander enabled
PARAMETER
TEST CONDITIONS
RXLIM = 750 mV
RXLIM = 850 mV
RXLIM = 950 mV
MIN
MAX
1.6
1.8
2
UNIT
Peak-to-peak output
V
PP
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
receive path specifications, V
= 5 V, f
= 3.58 MHz (continued)
xtal
CC
noise and distortion at HFO/HSO, RXTRIM = <1000>, VC = <1000>, expander enabled (see Table 1)
PARAMETER
MIN
MAX
1
UNIT
Psophometrically-weighted rms noise, RXIN = V
mV
BRX
Total harmonic distortion, RXIN = 200 mV rms at 1 kHz
1%
receive path switch attenuation (see Table 1)
PARAMETER
TEST CONDITIONS
CTI, CTM = 1
MIN
50
MAX
UNIT
TDI, RTM = 1
50
Attenuation
dB
RXVOICE, RVM = 1
LSSW, HSS = 0/1
50
50
receive data frequency response, NMT mode, RXIN = 100 mVrms, RXTRIM = <1000> (see Figure 11 and
Table 1)
PARAMETER
TEST CONDITIONS
f = 1.5 kHz
f = 100 Hz
MIN
MAX
10
UNIT
Gain
8
dB
–10
5.4
f = 600 Hz
f = 800 Hz
3.4
3.4
5.4
Relative gain
dB
f = 900 Hz
5.4
f = 2.2 kHz
f = 10 kHz
–4.3
–2.3
–15.5
receive data frequency response, AMPS/TACS mode, RXIN = 100 mVrms, RXTRIM = <1000> (see Figure 12
and Table 1)
PARAMETER
TEST CONDITIONS
f = 1 kHz
MIN
MAX
7
UNIT
Gain
5
dB
f = 8 kHz
±1
f = 16 kHz
–6
1
Relative gain
dB
f = 40 kHz
–18
–18
f = 100 kHz
receive SAT path frequency response, NMT mode, RXIN = 100 mVrms, RXTRIM = <1000>, SATTRIM = <100>
(see Figure 13 and Table 1)
PARAMETER
TEST CONDITIONS
f = 4 kHz
MIN
MAX
5
UNIT
Gain
3
dB
f = 100 Hz
f = 2 kHz
–35
–35
–25
–20
0.5
f = 3.2 kHz
f = 3.4 kHz
f = 3.8 kHz
f = 3.94 kHz
f = 4.06 kHz
f = 4.2 kHz
f = 5 kHz
–5
–5
Relative gain
±0.5
±0.5
0.5
dB
–20
–35
–35
f = 6 kHz
f = 10 kHz
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
receive path specifications, V
= 5 V, f
= 3.58 MHz (continued)
xtal
CC
receive SAT path frequency response, AMPS/TACS mode, RXIN = 100 mVrms, RXTRIM = <1000>,
SATTRIM = <100> (see Figure 15 and Table 1)
PARAMETER
TEST CONDITIONS
f = 6 kHz
MIN
MAX
5
UNIT
Gain
3
dB
f = 100 Hz
f = 3 kHz
–35
–35
–25
–20
0.5
f = 4.8 kHz
f = 5.1 kHz
f = 5.8 kHz
f = 5.94 kHz
f = 6.06 kHz
f = 6.2 kHz
f = 7.5 kHz
f = 9 kHz
–5
–5
Relative gain
±0.5
±0.5
0.5
dB
–20
–35
–35
f = 10 kHz
receive SAT path trim, SATTRIM, RXIN = 100 mVrms, f at 4 kHz NMT, f at 6 kHz AMPS/TACS, RXTRIM = <1000>
(see Table 1)
PARAMETER
MIN
3
MAX
5
UNIT
dB
Gain, SATTRIM = <100>
Step size
0.8
2.5
–4.5
1.2
3.5
–3.5
dB
Positive range
dB
Negative range
dB
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ST
100 nF
RXLIM
100 nF
100 nF
220 nF
100 nF
100 nF
CTI
4
16
EXIN
17
ETC
15
EXO
14
RXVI
13
8
12
RXO
CTI RXLIM ST
18
5
RXIN
RXIN
100 nF
DATA
LOAD
DATA
LOAD
10
11
9
HSO
HFO
HSO
HFO
RXDO
PSO
DAC
43
6
100 nF
100 nF
100 nF
DCLK
TXDA
DCLK
TXDA
22
RXDO
PSO
47 kΩ
47 kΩ
42
7
100 nF
100 nF
23
25
24
M1O
M1N
47 kΩ
47 kΩ
TCM8000
DAC
M1N
M2N
20 kΩ
3 Places
20
500 Ω
M1P
M2O
28
XT1
27
26
1
M2N
M2P
3.58
MHz
100 nF
21
40
XT0
GND
TXO
TXO
19
V
V
TDI
POUT
TXVI LIMIN
TXLIM
TXSUM
BTX
V
CC
CMPR
100 nF
REF
TXVO CIN CTC CVE CO
BRX
V
CC
3
2
44 29 30 31 32 33 34 35 36 38 39
37 41
100 nF
20 kΩ
10 µF
220 nF
3 Places
100
nF
220
nF
100 nF
GND
TDI
100 nF
100 kΩ
100 kΩ
100 nF
100 nF
47 pF
TXLIM
TXSUM
Pin numbers shown are for the FN package only.
Figure 2. Test Circuit
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
†
TYPICAL CHARACTERISTICS
TX VOICE FREQUENCY RESPONSE – NMT
TX PASS-BAND DETAIL – NMT
20
10
20
10
0
0
– 10
– 20
– 30
– 40
– 50
– 60
– 70
– 10
– 20
– 30
– 40
– 50
– 60
– 70
100
200
400
1000 2000 4000
10000
100
200
400
1000 2000
4000
10000
f – Frequency – Hz
f – Frequency – Hz
Figure 3
Figure 4
TX VOICE FREQUENCY RESPONSE – AMPS/TACS
20
TX PASS-BAND DETAIL – AMPS/TACS
15
10
10
0
5
– 10
– 20
– 30
– 40
– 50
– 60
– 70
0
– 5
– 10
– 15
– 20
100
200
400
1000 2000
4000
10000
100
200
400
1000 2000 4000
10000
f – Frequency – Hz
f – Frequency – Hz
Figure 5
Figure 6
†
The boundaries of the shaded areas represent the frequency response limits met by the TCM8000. The curves in the unshaded areas represent
typical filter response of the device.
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
†
TYPICAL CHARACTERISTICS
TX DATA FREQUENCY RESPONSE – NMT
TX DATA FREQUENCY RESPONSE – AMPS/TACS
5
10
5
0
0
– 5
– 5
– 10
– 15
– 20
– 25
– 30
– 10
– 15
– 20
– 25
– 30
100 200
1000
3000
10000
40000 100000
1000 2000
4000
10000 20000
100000
f – Frequency – Hz
f – Frequency – Hz
Figure 7
Figure 8
PASS-BAND DETAIL – RX VOICE
FREQUENCY RESPONSE
RX VOICE FREQUENCY RESPONSE
20
10
15
10
0
5
– 10
– 20
– 30
– 40
– 50
– 60
– 70
0
– 5
– 10
– 15
– 20
100
200
400
1000 2000
4000
10000
100
200
400
1000 2000 4000
10000
f – Frequency – Hz
f – Frequency – Hz
Figure 9
Figure 10
†
The boundaries of the shaded areas represent the frequency response limits met by the TCM8000. The curves in the unshaded areas represent
the filter response of the device.
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
†
TYPICAL CHARACTERISTICS
RX DATA FREQUENCY RESPONSE – NMT
RX DATA FREQUENCY RESPONSE – AMPS/TACS
5
10
5
0
– 5
0
– 10
– 5
– 10
– 15
– 20
– 15
– 20
– 25
– 30
100
200
400
1000 2000 4000
10000
1000 2000
4000
10000 20000
100000
f – Frequency – Hz
f – Frequency – Hz
Figure 11
Figure 12
RX SAT FREQUENCY RESPONSE – NMT
RX PASS-BAND DETAIL – NMT
10
0
1
0
– 1
– 2
– 3
– 4
– 5
– 6
– 10
– 20
– 30
– 40
– 50
– 60
– 7
– 8
– 9
0
2000
4000
6000
8000
10000
3500
3700
3900
4100
4300
4500
f – Frequency – Hz
f – Frequency – Hz
Figure 13
Figure 14
†
The boundaries of the shaded areas represent the frequency response limits met by the TCM8000. The curves in the unshaded areas represent
the filter response of the device.
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
†
TYPICAL CHARACTERISTICS
RX SAT FREQUENCY RESPONSE – AMPS/TACS
10
RX PASS-BAND DETAIL – AMPS/TACS
1
0
0
–1
– 10
– 2
– 3
– 4
– 5
– 6
– 20
– 30
– 40
– 50
– 60
– 7
– 8
– 9
0
2000
4000
6000
8000
10000
5500
5700
5900
6100
6300
6500
f – Frequency – Hz
f – Frequency – Hz
Figure 15
Figure 16
†
The boundaries of the shaded areas represent the frequency response limits met by the TCM8000. The curves in the unshaded areas represent
the filter response of the device.
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
相关型号：
©2020 ICPDF网 联系我们和版权申明